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430 MHz UNIT
5 0
Please remove the
installed , to allo w access to test points on the
430
MH z unit .
1.
Local oscillator circuit
( 1)
C onnect a DC voltmeter to pin
connector for the
430-432 ,
BAN D s witch to
1 1
volts is present . In turn , check pins
6
11
and
for
volts , while s witched to the
432-434, 434-436, 436-438,
440
MH z bands , respectively .
( 2) Connect the RF probe of the VTVM to TP 1 ,
and adjust Li602 , Ti6 01 , and Ti602 for
maximum indication on the VTVM .
(3)
Connec t t he frequency counter to TP1 . Re fer
to the chart belo w, and adjust TC1 601 -
TC16os f or local output readings as shown for
the various positions of the BAN D s witch .
(4)
Connec t the DC voltmenter to TP2 , and
adjust
TC1 sos -TC1 s o9
indication on the voltme ter
2.
Receiver section
(1)
Set the transceiver to
receiver preselector against the marker signal
for maximum sensitivity .
( 2) Connect the DC voltme ter to pin
edge connector , and chec k for
each position of the BAN D s witch over
430-440
MH z .
(3)
Connec t the signal generator to the
ANT jack , set its output to
tune the receiver to the generator signal .
Adjust TC12 01 -TC1203 and TC1 5 01 -TC1 so4
for a maximum S-meter indication on the HF
transceiver . Repeat on
437
439
MH z , and
to ensure maximum response across the entire
operating range .
3.
Transmitter section
( 1)
Connect the dummy load /wa ttmeter to the
430
MHz ANT jack . Se t VR1201 and VR1202
fully co unter clock wise . Se t the transceiver
D RI VE or C ARR I ER contro l to the center of
( 1 2
its range
o 'clock position ) .
1 44
and
MH z units , if
2
of the edge
430
MH z unit . Set the
and con firm that
3 , 4, 5,
438-
and
f or
maximum
( 1
volt nom . ) .
2 9
MH z , and peak the
1 9
of the
1 3 . 8
volts at
430
MH z
43 1
MHz, and
433
435
MHz ,
MH z ,
MH z . Recheck the results
(2)
Connect the RF probe of the VTVM to the
cathode of Di 502 . Peak TC1501 -TC1 5 04 for a
maximum indication on the VTVM while
transmitting .
(3)
Connect the RF probe of the VTVM to the
hot side of Li 213 . Peak TC12 03 -TC1 2 0 6 for a
maximum indication on the VTVM .
( 4)
Connect the RF probe of the VTVM to
terminal
A on the
TC 140 1 -TC1406 f or a maximum indication
on the VTVM .
(5)
Con firm the results in steps
on the wattmeter .
(6)
Repeak the points in steps
on each position of t he BAN D s witch , then
recheck the
performance over the entire range
440
MH z .
(7)
Set
the
meter
transceiver DRI VE or C ARRI ER con trol for
an output of
indication of
(8)
Beginning at zero drive , increase t he level
of the D R I V E or C ARRI ER control on t he
transceiver until the transverter po wer out
put does no t increase further .
(9)
Advance VR1201 slo wly c lock wise un til e qual
power output is achieved across the
440
MH z range .
( 1 0)
Rotate VR1 2 02 fully clockwise .
(1 1 )
While transmitting , rotate VR1301 to secure
maximum po wer output on the wattmeter .
( 1 2)
No w rotate VR1202 fully clockwise . While
trans mitting , slo wly rotate VR 1202 counter
clock wise ,until the po wer output just begins
to f all o ff . Do not go past the threshol d point .
( 1 3)
Remove the dummy load fro m the
ANT jack . V.hile transmit ting , chec k to be
sure that the P O meter indicates
load applied . If not , check the AFP unit f or
mal functioning p arts .
- 26 -
430
MH z unit . Peak
(2)
through
(2)
thro ugh
results
to ensure maximum
s witc h to
P O .
Set
1 2
watts . Adjust VR1203 for an
.8
on the P O meter .
430
. 2
(4)
(5)
430-
the
430-
MHz
with no
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